Lathe drive trains



Oct. 8, 1963 s. L. PIERCE 3,106,116

LATHE DRIVE TRAINS Filed Feb. 29. 1960 20 Sheets-Sheet 1 53 INVENTOR Gilbert L. Pierce see 374 .L, BY I M W c w ATTORNEYS Oct. 8, 1963 G. L. PIERCE LATHE DRIVE TRAINS 20 Sheets-Sheet 2 Filed Feb. 29. 1960 INVENTOR Gilbert L. Pierce BY %/*W ATTORNEY5' Oct. 8, 1963 G. L. PIERCE LATHE DRIVE TRAINS Filed Feb. 29, 1960 20 Sheets-Sheet 3 INVENTOR Gilbert. L. Pierce ATTORNEY 5 20 Sheets-Sheet 4 Filed Feb. 29, 1960 M2 vON NNN vNN NON ATTORNEYS Oct. 8, 1963 G. L. PIERCE 3,106,116

LATHE DRIVE TRAINS Filed Feb. 29. 1960 20 Sheets-Sheet 5 liQ I46 |68 I7? p INVENTOR I64 Gilbert L.P|erce I93 BY M rn ATTORNEYS Oct. 8, 1963 e. L. PIERCE 3,106,116

LATHE DRIVE TRAINS Filed Feb. 29, 1960 20 Sheets-Sheet e INVENTOR Gilbert L. Pierce ATTORNEY$ G. L- PIERCE LATHE DRIVE TRAINS Oct. 8, 1963 20 Sheets-Sheet 7 Filed Feb. 29, 1960 INVENTOR Gilbert L. Pierce ATTORNEY 5 G. L- PIERCE LATHE DRIVE TRAINS Oct. 8, 1963 20 Sheets-Sheet 8 Filed Feb. 29, 1960 ATTORNEYJ Oct. 8, 1963 a. L. PIERCE LATHE DRIVE TRAINS 20 Sheets-Sheet 9 Filed Feb. 29, 1960 ATTORNEY 5 061. s, 1963 G. 1.. PIERCE 3,106,116

Filed Feb. 29, 1960 20 Sheets-Sheet 10 III 1 III E H:

Oct. 8, 1963 Filed Feb. 29. 1960 G. L. PIERCE LATHE DRIVE TRAINS Oct. 8, 1963 cs. L. PIERCE 3,106,116

LATHE DRIVE TRAINS Filed Feb. 29. 1960 2o Sheets-Sheet 12 INVENTOR Gilbert L. Pierce ATTORNEYS Oct. 8, 1963 G. L. PIERCE ,106,116

LATHE DRIVE TRAINS Filed Feb. 29, 1960 20 Sheets-Sheet 13 364 INVENTOR Gilbert L. Pierce ATTORNEYS Oct. 8, 1963 G. L. PIERCE 3,106,116

Filed Feb. 29, 1960 02 "1.01 IL P G. L. PIERCE LATHE DRIVE TRAINS Oct. 8, 1963 Filed Feb. 29. 1960 20 Sheets-Sheet 15 I INVENTOR Gilbert L. Pierce ATTORNEYS Oct. 8, 1963 G. L. PIERCE ,106,116

LATHE DRIVE TRAINS Filed Feb. 29, 1960 20 Sheets-Sheet 16 INVENTOR Gilbert L. Pierce ATTORNEYS Oct. 8, 1963 e. L. PIERCE LATHE DRIVE TRAINS Filed Feb. 29. 1960 20 Sheets-Sheet 17 ATTORNEYS Oct. 8, 1963 G. L. PIERCE LATHE DRIVE TRAINS 2O Sheets-Sheet 18 Filed Feb. 29, 1960 g M W A: .1. Mm w Wm 8. U

Oct. 8, 1963 G. L. PIERCE LATHE DRIVE TRAINS 2O Sheets-Sheet 19 Filed Feb. 29. 1960 VA A INVENTOR Gilbert L. Pierce WW 9 W ATTORNEY5 G. L. PIERCE LATHE DRIVE TRAINS Oct. 8, 1963 20 Sheets-Sheet 20 Filed Feb. 29. 1960 INVENTOR ATTORNEYS 

1. IN A MULTI-SPEED DRIVE FOR A METAL LATHE PROVIDING CORRELATED SPINDLE, CARRIAGE AND CROSS SLIDE DRIVES COMPRISING A POWER SOURCE INCLUDING A POWER SHAFT AND DRIVE PULLEY; A LATHE BED HAVING FRONT, SIDE AND END WALLS AND CONVENTIONAL LONGITUDINAL WAYS; A SPINDLE DRIVE GEAR BOX FIXEDLY MOUNTED AT ONE END OF SAID LATHE BED ON SAID LONGITUDNAL WAYS AND INCLUDING A SPINDLE ADAPTED TO MOUNT A WORKPIECE FOR ROTATION THEREWITH, AN OUTPUT GEAR DRIVEN BY SAID SPINDLE, A DRIVEN PULLEY CONNECTED TO SAID SPINDLE AND A PULLEY BELT OPENING IN ITS WALL OPPOSITE SAID DRIVEN PULLEY; A TOOL CARRIAGE SLIDABLY SUPPORTED ON SAID LONGITUDINAL WAYS AND HAVING CARRIAGE FEED DRIVE MEANS FOR SELECTIVE CONNECTION TO A FEED SCREW; A FEED SCREW JOURNALLED ON SAID LATHE BED IN LONGITUDINAL PARALLELISM TO SAID LONGITUDINAL WAYS; MEANS FOR SELECTIVELY DRIVINGLY CONNECTING SAID FEED SCREW AND SAID CARRIAGE FEED DRIVE MEANS; A TOOL CROSS SLIDE SLIDABLY SUPPORTED ON SAID TOOL CARRIAGE AND HAVING DRIVE MEANS THEREFORE; MEANS FOR SELECTIVELY DRIVINGLY CONNECTING SAID FEED SCREW TO SAID CROSS SLIDE DRIVE MEANS; A MULTI-SPEED SELECTOR TYPE GEAR TRAIN INCLUDING SUPPORT MEANS MOUNTING ITS ALL SAID ONE END OF SAID LATHE BED ADJACENT SAID SPINDLE DRIVE GEAR BOX INCLUDING AN OUTPUT GEAR DRIVINGLY CONNECTING SAID OUTPUT SPINDLE SHAFT TO SAID FEED SCREW TO SELECTIVELY ESTABLISH ONE OF SEVERAL AVAILABLE SPEED RATIOS BETWEEN SAID OUTPUT SPINDLE SHAFT AND SAID FEED SCREW; AND INFINITELY VARIABLE PULLEY DRIVE MEANS DRIVINGLY INTERCONNECTING SAID POWER SHAFT AND SAID SPINDLE DRIVE GEAR BOX DRIVEN PULLEY COMPRISING A VARISPEED PULLEY MOUNTING SUPPORT BRACKET FIXED ON SAID LATHE BED AND HAVING A PAIR OF LATERALLY SPACED PIVOTS MOUNTED THEREON WITH THEIR AXES ALIGNED AND INCLINED WITH RESPECT TO THE AXES OF SAID DRIVE AND DRIVEN PULLEYS, A VARI-SPEED PULLEY AND SHAFT ASSEMBLY SUSPENDED FROM SAID PAIR OF SPACED PIVOTS AND HAVING ITS VARI-SPEED PULLEY AND SHAFT AXIS GENERALLY LONGITUDINALLY RELATED TO SAID AXES OF SAID DRIVING AND DRIVEN PULLEY AND MEANS FOR SWINGING SAID VARI-SPEED PULLEY AND SHAFT ASSEMBLY AROUND THE INCLINED AXES OF SAID PIVOTS TO EFFECT A DESIRED SPEED CHANGE OF SAID VARIABLE PULLEY DRIVE MEANS WHILE MAINTAINING THE PULLEY BELTS SUBSTANTIALLY IN PREDETERMINED PLANES OF TRAVEL. 